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Anomalous Wave Energy Deposition in the Beginning Phases of Wave Injection in JT-60U Lower Hybrid Current Drive Experiments |
| FANG Yu-de1;Kenkichi USHIGUSA2;Takashi KONDOH2 |
| 1Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
2JT-60U Experiment Division, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka-Machi, Naka-gun, Ibaraki-ken, Japan
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| Cite this article: |
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FANG Yu-de, Kenkichi USHIGUSA, Takashi KONDOH 1999 Chin. Phys. Lett. 16 827-829 |
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Abstract An anomalous phenomenon of wave energy deposition and its evolution were noticed in the beginning phases of lower hybrid wave injection in JT-60U experiments. It was found that the driven currents are always formed in the central region of the plasma column in the first several hundred milliseconds of the wave pulses, no matter what N|| spectrum of the waves is. Then the driven current profile will change to their normal situation gradually, which depends on N|| spectrum closely.
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52.55.Fa
52.50.Gj
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Published: 01 November 1999
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| PACS: |
52.55.Fa
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(Tokamaks, spherical tokamaks)
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52.50.Gj
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(Plasma heating by particle beams)
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